Patent · US Expired

Piston metering apparatus of a reaction injection molding machine

US4643581A · kind A · utility

5Cited by

7References

15Claims

0Family size

Assignee

Krauss-Mafei AG · DE

Inventors

Wolfgang Soechtig · Germering, DE
Peter Wagner · Starnberg, DE
Karl-Ludwig Korzeczek · Munich, DE

Key dates

Filing date	Sep 28, 1984
Grant date	Feb 17, 1987
Priority date	—
Expiry date	Sep 28, 2004

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16J15/183
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A piston metering apparatus for the metering of the components of a reaction injection molding machine comprising a metering cylinder (2) the cylinder space of which is surrounded by a cylinder wall, a metering piston (10) sealed in relation to the cylinder wall by means of a sealing unit, a cylinder base (3), component inlet (4) and component outlet lines (5) connected with the metering cylinder (2), and a metering piston (10) coupled with the hydraulic piston rod of a hydraulic drive unit (12). In order to simplify the inspection and maintenance of such a piston metering apparatus, the metering piston (10) is in the form of a plunger piston and the sealing unit is contained in a sealing cartridge (9) releasably fastened to the upper edge of the metering cylinder (2).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.